avfilter/f_ebur128: multiply in integer first, before dividing in float

Restores the order of operations from before 15a1104, which reduces errors from floating point calculations, and fixes FATE on mingw64.

Hendrik Leppkes committed 4 years ago

Commit cd962111 parent 607ecc21 file · +2 −2Browse files

Unified · Split

@@ -768,7 +768,7 @@ static int filter_frame(AVFilterLink inlink, AVFrame insamples) · 767 unmodified lines
768	768
769	769	/* get lower loudness to consider */
770	770	n = 0;
771		− nb_pow = LRA_LOWER_PRC * 0.01 * nb_powers + 0.5;
	771	+ nb_pow = LRA_LOWER_PRC * nb_powers * 0.01 + 0.5;
772	772	for (i = gate_hist_pos; i < HIST_SIZE; i++) {
773	773	n += ebur128->i3000.histogram[i].count;
774	774	if (n >= nb_pow) {
@@ -779,7 +779,7 @@ static int filter_frame(AVFilterLink inlink, AVFrame insamples) · 4 unmodified lines
779	779
780	780	/* get higher loudness to consider */
781	781	n = nb_powers;
782		− nb_pow = LRA_HIGHER_PRC * 0.01 * nb_powers + 0.5;
	782	+ nb_pow = LRA_HIGHER_PRC * nb_powers * 0.01 + 0.5;
783	783	for (i = HIST_SIZE - 1; i >= 0; i--) {
784	784	n -= FFMIN(n, ebur128->i3000.histogram[i].count);
785	785	if (n < nb_pow) {

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